The GJD397 D-TECT X Repeater is a high-power, long-range device designed to extend the RF range of a D-TECT X detector or boost signal in areas with poor reception. It must be placed within 500 metres line of sight between the D-TECT X detector(s) and D-TECT X Receiver(s). The repeater will repeat all signals from D-TECT X detectors within range and does not require any programming to function, making it easy to set up and use.